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目的探讨小视野扩散加权成像(reduced field of view diffusion weighted imaging,rFOV DWI)评价膝关节骨挫伤骨髓水肿的可行性。材料与方法招募60例膝关节骨挫伤患者,均行矢状位质子加权成像脂肪抑制序列(proton density-weighted imaging fat-saturated,PDWI-FS)、全视野扩散加权成像(full field of view DWI,fFOV DWI)及rFOV DWI扫描。相同层面膝关节rFOV DWI、fFOV